patch 8.1.0186: test for getwininfo() fails in GUI

Problem:    Test for getwininfo() fails in GUI.
Solution:   Account for missing tabline.
diff --git a/src/version.c b/src/version.c
index f638db6..08e39b4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    186,
+/**/
     185,
 /**/
     184,